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Micro-nano multi-layer composite dielectric materials and preparation method and device thereof

A dielectric material, micro-nano multi-layer technology, applied in the field of material science, can solve the problems of polymer performance degradation, etc., to achieve the effect of improving dispersion, product dielectric constant and simple process

Inactive Publication Date: 2013-06-05
贵州省复合改性聚合物材料工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the performance of the material itself and the related mechanism for increasing the dielectric constant, the composite material with high dielectric constant requires a high content of ceramic filling, and the performance of the polymer decreases significantly.

Method used

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  • Micro-nano multi-layer composite dielectric materials and preparation method and device thereof
  • Micro-nano multi-layer composite dielectric materials and preparation method and device thereof
  • Micro-nano multi-layer composite dielectric materials and preparation method and device thereof

Examples

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preparation example Construction

[0016] The preparation method of the micro-nano multi-layer composite dielectric material is to mix 50 parts of PVDF and MWNT first, and then add them to a twin-screw extruder for blending and extrusion to obtain a PVDF / MWNT blend; the remaining PVDF and PVDF / MWNT blends are respectively added to different extruders of the special polymer micro-nano lamination co-extrusion device for multi-layer co-extrusion, and the extruded film material is thermally stretched to obtain alternating PVDF layers 8 and PVDF / MWNT layers 9 The finished product, PVDF / MWNT layer 9 is distributed with disentangled multi-walled carbon nanotubes 10, and the multi-walled carbon nanotubes 10 are dispersed in a line shape; the single-layer thickness of the prepared PVDF layer 8 or PVDF / MWNT layer 9 is 50nm; The hot stretching specifically means that after the film material is extruded from the extruder, the temperature of the extruded film material has not been significantly lowered, and it is pulled b...

Embodiment 2

[0018] Embodiment 2 of the present invention: micro-nano multi-layer composite dielectric material, it comprises polymer layer and polymer blend layer, is alternate structure between polymer layer and polymer blend layer; In the material layer, the filler is evenly distributed in the polymer matrix in one or more forms of spherical, flake, linear or rod; calculated in parts by weight, the polymerization in the polymer layer and the polymer blend layer The total amount of the material matrix is ​​88 parts, and the filler of the polymer blend layer is 12 parts; the polymer matrix is ​​polyvinylidene fluoride (PVDF), and the filler is modified polyaniline (PANI).

[0019] The preparation method and the device used are the same as in Example 1.

Embodiment 3

[0020] Embodiment 3 of the present invention: micro-nano multi-layer composite dielectric material, it comprises polymer layer and polymer blend layer, is alternate structure between polymer layer and polymer blend layer; In the material layer, the filler is evenly distributed in the polymer matrix in one or more forms of spherical, flake, linear or rod; calculated in parts by weight, the polymerization in the polymer layer and the polymer blend layer The total amount of the material matrix is ​​80 parts, and the filler of the polymer blend layer is 20 parts; the polymer matrix is ​​polyvinylidene fluoride (PVDF), and the filler is nano barium titanate (nBaTO 3 ).

[0021] The preparation method and the device used are the same as in Example 1.

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Abstract

The invention discloses micro-nano multi-layer composite dielectric materials and a preparation method and a device thereof. The micro-nano multi-layer composite dielectric materials comprise a polymer layer and a polymer blend layer, and the polymer layer and the polymer blend layer interlace with each other. In the polymer blend layer, one kind or more kinds of padding among globular padding, flakiness padding, threadiness padding and rodlike padding are evenly distributed in a polymer matrix. According to the micro-nano multi-layer composite dielectric materials and the preparation method and the device thereof, the padding is added into the polymer matrix, a specialty polymer micro-nano stacking and co-extruding device is used, a polymer dielectric membrane with a micro-nano multi-layer structure is prepared, thus dispersibility of the padding is improved effectively and modified padding is evenly distributed in the polymer matrix in a product, and therefore the purpose of controlling the dielectric property of a polymer is realized. In the preparation process of the micro-nano multi-layer composite dielectric materials, no solvent or binder exists, production cost is low, the micro-nano multi-layer composite dielectric materials are environment friendly, continuous production can be achieved, and the dielectric constant of the obtained product is improved notably.

Description

technical field [0001] The invention relates to the field of material science, in particular to a polymer composite material and its preparation method and device. Background technique [0002] High dielectric materials have excellent performance of storing electric energy and uniform electric field, and can be better applied to small-volume, large-capacity microcapacitors, electronic computer memory elements, thermistors, electromagnetic shielding devices, cable sealing components, electromagnetic wave absorption , underwater acoustic detectors, aerospace vehicles and submarines and other devices or equipment. Traditional dielectric materials are ceramic materials, which are fragile and difficult to shape. Polymer materials are easy to form and process, but have a low dielectric constant and have little practical value. Usually, the method to increase the dielectric constant of polymer matrix composites is mainly to add high dielectric constant ceramic powder to the polym...

Claims

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Application Information

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IPC IPC(8): B32B27/20B32B27/32B32B27/36B32B27/30B29C47/06
Inventor 韦良强孙静秦舒浩于杰何力罗恒徐国敏
Owner 贵州省复合改性聚合物材料工程技术研究中心
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